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Re: [Xen-devel] Timer going backwards and Unable to handle kernel NULLpo
| To: | Jan Beulich <jbeulich@xxxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Timer going backwards and Unable to handle kernel NULLpointer |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | Wed, 30 May 2007 17:25:10 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, Robert Hulme <rob@xxxxxxxxxxxx> |
| Delivery-date: | Wed, 30 May 2007 09:23:36 -0700 |
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| Thread-index: | Acei1xeKVjL7Yg7KEdyiOwAX8io7RQ== |
| Thread-topic: | [Xen-devel] Timer going backwards and Unable to handle kernel NULLpointer |
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On 30/5/07 17:02, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > No, this is simply the port write (in acpi_hw_set_mode(), case > ACPI_SYS_MODE_ACPI), > obviously followed by lengthy SMM execution. Ah, okay. How about if we add support for ACPI PM timer as platform clock source? Should be easy, any ACPI system will most likely provide it, and it should be much better to use than the PIT (even a 24-bit PM timer should only wrap every 5 seconds). We'll have to prevent dom0 monkeying with the timer: either disallow accesses, or emulate the register. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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